Ionic Diode Characteristics at a Polymer of Intrinsic Microporosity (PIM) | Nafion "Heterojunction" Deposit on a Microhole Poly(ethylene‐terephthalate) Substrate. Issue 10 (27th June 2017)

• Record Type: Journal Article
• Authors: Putra, Budi Riza; Aaronson, Barak D.B.; Madrid, Elena; Mathwig, Klaus; Carta, Mariolino; Malpass‐Evans, Richard; McKeown, Neil B.; Marken, Frank
• Is Part Of: Electroanalysis. Volume 29:Issue 10(2017)
• Page Start: 2217
• Page End: 2223
• Publication Date: 2017-06-27
• Subjects: Ionomer -- polymer interface -- voltammetry -- nanofluidics -- ionic diode -- desalination; Electrochemical analysis -- Periodicals; Chemistry, Analytical -- Periodicals; Electrochemistry -- Periodicals; 543.4
• DOI: 10.1002/elan.201700247
• Languages: English
• ISSNs: 1040-0397

Abstract

Abstract: Ionic diode phenomena occur at asymmetric ionomer | aqueous electrolyte microhole interfaces. Depending on the applied potential, either an "open" or a "closed" diode state is observed switching between a high ion flow rate and a low ion flow rate. Physically, the "open" state is associated mainly with conductivity towards the microhole within the ionomer layer and the "closed" state is dominated by restricted diffusion‐migration access to the microhole interface opposite to the ionomer. In this report we explore a "heterojunction" based on an asymmetric polymer of intrinsic microporosity (PIM) | Nafion ionomer microhole interface. Improved diode characteristics and current rectification are observed in aqueous NaCl. The effects of creating the PIM | Nafion micro‐interface are investigated and suggested to lead to novel sensor architectures. Abstract :